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From "Dibyendu Majumdar" <dibye...@mazumdar.demon.co.uk>
Subject Re: Derby architecture/design documents
Date Tue, 01 Feb 2005 19:36:18 GMT

A quick question about logging and recovery:

Are redo log records always physical - i.e. page orientated?

I am guessing that undo records are sometimes logical and sometimes
physical. My guess is that it is physical for structural changes, but
logical for row inserts/deletes, etc. Is that correct?

I am going to try and describe logging and recovery next.

Thanks for your comments on the previous document - I will update and


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